Cut wire shot leaves the cutting operation as a short cylinder with sharp ends, its length equal to its diameter. In that state it is aggressive: the edges cut rather than indent, so it strips scale, paint and oxide quickly.

Conditioning is a mechanical rounding process that removes those edges. The particle becomes progressively closer to spherical, loses the cutting action and gains a consistent indenting one.

Peening specifications call for conditioned shot without exception, and the reason is mechanical rather than bureaucratic. Peening works by plastically deforming the surface layer into compression; a sharp edge striking that surface indents unevenly and can initiate a crack, which is the exact failure the process exists to prevent.

For cleaning, either will work, and the choice becomes economic. As-cut cleans faster, conditioned leaves a smoother finish, and many operations run as-cut for the first pass and conditioned for the finish.